New Chapter-- Fundamentals of Dimension Determination A Combined Chapters of 4, 6, 8 and 17 Mainly use the Teaching Notes.

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Presentation transcript:

New Chapter-- Fundamentals of Dimension Determination A Combined Chapters of 4, 6, 8 and 17 Mainly use the Teaching Notes

Shaft applications

Axial Loading P = load and A =cross-section area Or

Simple Bending Where M= bending moment C = distance from neutral axis to outer most fiber I = moment of inertia of the area Or

Simple torsion of circular shafts T = Torque, C = radius to outer most fiber J = Polar moment

Combined Bending and torsion of Circular Shafts

Final Shaft design Equations

Sample Problem 17.1 – snowmobile and track drive shaft

Combined Bending and Torsion of Circular Shaft

Stress flow-lines

Stress Concentration Factors d P c P a b

Problem: D/d = 1.2, r  0.1d, F = 550 lb, T = 2,100 lb-in Material hot rolled 1020 steel. Find d, D, and r for safety factor 3. The load is static, we have equation